======================== unified (from filesystem) ========================
                                         'bitrate'  '142.117'
                                        'duration'  '249'
                                          'artist'  'Hassan Kassai'
                                     'text_people'  'Traditional'
                                         'release'  'The Silk Road: A Musical Caravan'
                                           'title'  'Shushtari'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-3', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-4', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['iranian', 'persian traditional', 'traditional', 'ney', 'persian']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '24'
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'loc-m-unsorted'
                                             'bpm'  '144.955'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     'The Silk Road: A Musical Caravan'
'TBPM' (BPM (beats per minute))                     '144.955'
'TCMP'                                              '1'
'TCOM' (Composer)                                   'Traditional'
'TCON' (Content type, a.k.a. Genre)                 'loc-m-unsorted'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Shushtari'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Hassan Kassai'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/2'
'TRCK' (Track number/Position in set)               '9/24'
'TXXX:PERFORMER'                                    "Hasan Kasa'i (ney), (Radio Tehran, ~1966)"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '4'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '3'
'TXXX:iTunes_CDDB_IDs'                              '24+35871D553343029DA4C835FA10D93DDB+2034098'
'TXXX:lastfmtags'                                   ['iranian', 'persian traditional', 'traditional', 'ney', 'persian']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.79 dB'
'TXXX:replaygain_track_peak'                        '0.356410'
'TXXX:tempo'                                        '00000 BPM'

========================== row from database ==========================
                                              'id'  1396970
                                            'path'  /data/Music/Bulk/00localcharacter/00south-europe-middle-east/disc 1/09. Hassan Kassai - Shushtari (Iranian).mp3
                                         'working'  None
                                         'bitrate'  142
                                    'duration_sec'  249
                                           'genre'  loc-m-unsorted
                                        'filesize'  4427898
                                           'mtime'  1621627085
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00south europe middle east disc 1 09. (Iranian) loc m unsorted
                                      'tag_artist'  Hassan Kassai
                                     'tag_release'  The Silk Road: A Musical Caravan
                                       'tag_title'  Shushtari
                                             'bpm'  144.955
                                    'search_title'  'shushtari':1
                                   'search_artist'  'hassan':1 'kassai':2
                                  'search_release'  'a':5 'caravan':7 'musical':6 'road':3,4 'silk':2 'the':1
                                     'search_rest'  '00south':1 '09':7,8 '1':6 'disc':5 'east':4 'europe':2 'iranian':9,10 'loc':11 'm':12 'middle':3 'unsorted':13
                                    'search_combo'  '00south':11 '09':17,18 '1':16 'a':8C 'caravan':10C 'disc':15 'east':14 'europe':12 'hassan':2B 'iranian':19,20 'kassai':3B 'loc':21 'm':22 'middle':13 'musical':9C 'road':6C,7C 'shushtari':1A 'silk':5C 'the':4C 'unsorted':23
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['iranian', 'persian traditional', 'traditional', 'ney', 'persian']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627084.6194794  (2021-05-21 21:58:04)
                             'size'  4427898